Wavelike Properties of Solar Supergranulation Detected in Doppler Shift Data

Details Wavelike Properties of Solar Supergranulation Detected in Doppler Shift Data Wavelike Properties of Solar Supergranulation Detected in Doppler Shift Data

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...596l.259s&link_type=abstract

The Astrophysical Journal, Volume 596, Issue 2, pp. L259-L262.

Astronomy and Astrophysics

Astronomy

27

Convection, Sun: Photosphere, Sun: Rotation, Turbulence, Waves

Scientific paper

Recently, Gizon, Duvall, & Schou suggested that supergranulation has a wavelike component. In this Letter, I show that the same phenomenon can be observed using surface Doppler shift data, thereby confirming their observations, which were made using a helioseismic time-distance technique. In addition to confirming those results, I show that the wave motion is predominantly longitudinal (the fluid displacement is in the direction of propagation), and I am able to extend the results for the rotation and the meridional flow beyond +/-70° latitude. The meridional flow results, which extend further than previous helioseismic measurements, appear to show no sign of a second cell.

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